Oklahoma - Roofing - Drip edge

I posted this under an existing topic and haven’t received response. I thought I would create a new topic…

In Oklahoma. Newb here! I just looked at the drip edge on my newly installed roof. No metal drip edge, as you would expect. I reached out to roofer. He advised “ If the home has a wood drip edge which every one that I’ve seen in that neighborhood has we don’t put a metal drip edge. ” I reached out to insurance agent for his thoughts and he added “ By the Residential Code for the State of Oklahoma, if your home has 1x2 trim board (wooden drip edge) around the perimeter on the fascia under roof eave and rake lines, then the metal drip edge is not required as that trim board performs the same function .” Here’s a note on the change - note the exception language.

Section 748:20-5-11.1 - IRC[®] 2015 Chapter 9 Roof Assemblies, Okla. Admin. Code § 748:20-5-11.1 | Casetext Search + Citator .

Do you call it out in OK?

Here is the key verbiage here…

So, what is your measurement??

(Less than 1/4 inch will cause wood rot over time. Over 1 inch will cause shingle damage over time).

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Also, check the installation instructions from the shingle manufacturer. If their instructions require one and it is not installed, their warranty may be void.


It’s an interesting point. The picture below shows the GAF Timberline shingle installation instructions. In MN, drip edge is not required unless the shingle manufacturer requires it. Does the verbiage below show a requirement for drip edge? If so, does it also require the use of GAF brand “leak barrier” and GAF brand “roof deck protection?” If I don’t use GAF brand products for underlayment and ice shield, is my warranty no good? :man_shrugging:

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My state of Kentucky follows the 2015 IRC

International Residential Code 2015 (IRC 2015)

R905.2.8.5 Drip Edge

A drip edge shall be provided at eaves and gables of shingle roofs. Adjacent pieces of drip edge shall be overlapped a minimum of 2 inches (51 mm). Drip edges shall extend a minimum of 0.25 inch (6.4 mm) below the roof sheathing and extend up the roof deck a minimum of 2 inches (51 mm). Drip edges shall be mechanically fastened to the roof deck at a maximum of 12 inches (305 mm) on center with fasteners as specified in Section R905.2.5. Underlayment shall be installed over the drip edge along eaves and under the drip edge on gables. Alternate methods to the standard metal drip edge may include site formed coil stock that creates a drip line as intended by the code. Wood, composite, and manufactured trim installed on the fascia shall create a drip line to prevent water from running back under the shingles, which will meet the requirements of the drip edge.

Yes, yes I did recommend it…wood rots, metal does not…didn’t really care what the code was, in this instance.


Good question. The answer might be in the warranty section. You’ll likely need a microscope to read it.